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rice hull ash
The absorbance spectrum of the residual lutein was not altered by rice hull ash, but was changed when exposed to bleaching clay.
      
Adsorption of soy oil free fatty acids by rice hull ash
      
Studies demonstrated that free fatty acids can be adsorbed from a soybean oil/hexane miscella by inorganic rice hull ash.
      
The adsorption behavior of rice hull ash may be more fully understood with a better knowledge of adsorbent structure.
      
Competitive adsorption of lutein from soy oil onto rice hull ash
      
The structure and composition of processed rice hull ash were studied to better understand its adsorption of the soy oil components, lutein and free fatty acids.
      
Quantitative differences in the adsorption behavior between a bleaching clay, alkaline rice hull ash and acid rice hull ash were measured by comparing the constants,K andn, of Freundlich isotherms.
      
The effectiveness of sequential isopropanol/hexane washes of increasing polarity for desorbing soy oil pigment (lutein) from alkaline and acid rice hull ash was studied.
      
Phospholipid adsorption onto rice hull ash from soy oil miscellas
      
Phospholipid was adsorbed from soy oil miscellas by rice hull ash, with small doses of adsorbent binding most efficiently.
      
Adsorption of carotene from palm oil by acid-treated rice hull ash
      
Rice hull ash obtained by heat treatment and acid activated followed by washing was not effective as an adsorbent for carotene in palm oil in contrast to that reported for adsorption of soy oil lutein.
      
Adsorption isotherms of fatty acids on rice hull ash in a model system
      
The adsorption of lauric, myristic and stearic acids on rice hull ash (RHA) from isooctane as solvent was studied and conformed to a Langmuir isotherm.
      
Mode of oleic acid adsorption on rice hull ash cristobalite
      
Fourier transform infrared spectroscopy was used to investigate the adsorption of oleic acid (OA) onto dry rice hull ash (RHA) silica.
      
Rice hull ash adsorbent performance under commercial soy oil bleaching conditions
      
Utilization of rice hull ash as a support material for immobilization of Candida cylindracea lipase
      
Rice hull ash was heated in a muffle furnace at 700°C for 2 h and metallic oxides were leached with 10% sulfuric acid.
      
Saturated fatty acid adsorption by acidified rice hull ash
      
 

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